Where AV13 fits in the range
AV13 is a model-level route inside air vents and air eliminators. It is useful when the specification already names AV13, or when a compact brass thermostatic air vent is being checked for a steam main or equipment high point.
Product facts
Available product material identifies AV13 as a maintainable balanced-pressure thermostatic air vent for steam systems. It has a brass body, angle connection, BSP or NPT threaded connections, PN16 design condition and a maximum operating pressure of 13 bar g.
The documented size range covers 3/8", 1/2" and 3/4". The selectable complete-unit rows on this page focus on 1/2" and 3/4", so final replacement should confirm the installed connection and duty.